Question

Can you please help me olve theses

Answer 1

Answer:

$f(x) = 0 \text{ when } x = \bold{1}$

$f(-7) =\bold{224}$

Step-by-step explanation:

Solving for the input, $\bold{x}$, given the output:

Given:

$f(x) = 4x -4$

Solving for $x$ from the equation, $f(x) = 0$:

$f(x) = 0 \\ 4x -4 = 0 \\ 4x = 4 \\ x = \frac{4}{4} \\ x = 1$

Solving for the output, $\bold{f(x)}$, given the input.

Given:

$f(x) = 4x^2 -4x$

Solving $f(-7)$:

$f(-7) = 4(-7)^2 -4(-7) \\ f(-7) = 4(49) -4(-7) \\ f(-7) = 196 +28 \\ f(-7) = 224$